/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.edu.thu.laud.utils.serde;

import java.nio.ByteBuffer;

import cn.edu.thu.laud.utils.serde.Serializer;


/**
 * Wrapper around our serlializer instance
 * 
 * @author zhuoan
 * 
 */
public class SerializerWrapperConverter implements IConverter {
	private Serializer serializer;

	public SerializerWrapperConverter(Serializer serializer) {
		this.serializer = serializer;
	}

	@Override
	public Object getObject(ByteBuffer buffer, ConverterContext context) {
		if (buffer == null) {
			return null;
		}

		// TODO this be required to copy
		byte[] data = new byte[buffer.limit() - buffer.position()];

		buffer.get(data);

		return serializer.getObject(data);

	}

	@Override
	public ByteBuffer writeBytes(Object value, ByteBuffer buffer, ConverterContext context) {

		byte[] serialized = serializer.getBytes(value);

		ByteBuffer returned = ConverterContext.check(buffer, serialized.length);

		return returned.put(serialized);

	}


	@Override
	public String getComparatorType() {
		return "BytesType";
	}

}
